jagging
Webster's Dictionary (GCIDE)
Jag \Jag\, v. t. [imp. & p. p. Jagged; p. pr. & vb. n. Jagging.] To cut into notches or teeth like those of a saw; to notch. [Written also jagg.] [1913 Webster]
Jagging iron, a wheel with a zigzag or jagged edge for cutting cakes or pastry into ornamental figures. [1913 Webster]